Secondhand smoke (SHS) is a significant risk to child health, linked to SIDS and asthma. The Scottish Government aims to reduce children’s SHS exposure by 50% by 2020, by encouraging parents to quit or smoke outside. This new study led by an early career PI builds on our previous ELHF work which identified that single, disadvantaged parents with young, mobile children and limited outside access are unable to smoke outside. Using an assets-based approach, parents and practitioners will co-produce a tool with a suite of options for practitioners to use with parents to protect children, including new harm reduction products such as temporary nicotine replacement therapy and e-cigarettes. Building a consensus on a harm reduction approach to reduce the risk to children whose parents cannot smoke outside addresses an unmet need in protecting the health of the most disadvantaged children.